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#!/usr/bin/env nix-shell
#!nix-shell -i bash -p nix-prefetch-scripts
set -eou pipefail
version=$1
bucket="https://download.pytorch.org/libtorch"
CUDA_VERSION=cu116
url_and_key_list=(
"x86_64-darwin-cpu $bucket/cpu/libtorch-macos-${version}.zip libtorch-macos-${version}.zip"
"x86_64-linux-cpu $bucket/cpu/libtorch-cxx11-abi-shared-with-deps-${version}%2Bcpu.zip libtorch-cxx11-abi-shared-with-deps-${version}-cpu.zip"
"x86_64-linux-cuda $bucket/${CUDA_VERSION}/libtorch-cxx11-abi-shared-with-deps-${version}%2B${CUDA_VERSION}.zip libtorch-cxx11-abi-shared-with-deps-${version}-${CUDA_VERSION}.zip"
)
hashfile="binary-hashes-$version.nix"
echo " \"$version\" = {" >> $hashfile
for url_and_key in "${url_and_key_list[@]}"; do
key=$(echo "$url_and_key" | cut -d' ' -f1)
url=$(echo "$url_and_key" | cut -d' ' -f2)
name=$(echo "$url_and_key" | cut -d' ' -f3)
echo "prefetching ${url}..."
hash=$(nix hash to-sri --type sha256 $(nix-prefetch-url --unpack "$url" --name "$name"))
echo " $key = {" >> $hashfile
echo " name = \"$name\";" >> $hashfile
echo " url = \"$url\";" >> $hashfile
echo " hash = \"$hash\";" >> $hashfile
echo " };" >> $hashfile
echo
done
echo " };" >> $hashfile
echo "done."
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